1. Hurry up or she will miss the train.
 If __she doesn’t hurry up,she will miss the train. ______________________________________________________________
 If __she hurries up, she won't miss the train. ______________________________________________________________
2. Work hard and he will pass the exam.
 If __he works hard ,he will pass the exam ______________________________________________________________
3. Study hard or you’ll fail in the entrance examination.
 If ___you don’t study hard, you will fail in the entrance exam. _____________________________________________________________
 If ___you study hard, you won't _fail in the entrance exam. ____________________________________________________________
4. With luck, he may pass the entrance examination.
 If __he is lucky, he may pass the entrance examination. ______________________________________________________________
5. You must concentrate, or you won’t understand the lesson.
 If _you don't concentrate,  you will not understand the lesson. _______________________________________________________________
 If __you concentrate, you will understand the lesson.  ______________________________________________________________
6. Don’t be careless or you’ll fall over the rock.
 If _you are careless, you will fall over the rock. _______________________________________________________________
 If __you are not careless, you will not fall over the rock. ______________________________________________________________
7. Peter will pass his exam, but he has to study hard.
 If _Peter studies hard, he will pass the exam.  _______________________________________________________________
8. Working too much will make you tired.
 If __you work so much, you will be tired. ______________________________________________________________
 If __you don't work so much, you won't be tired ______________________________________________________________
9. Hard work leads us to success.
 If __we work hard,we will  success ______________________________________________________________
10. Be careful or you’ll break the vase.
 If __you aren't carefull ,you will break the wave ______________________________________________________________
 If _you are careful, you won't break the vase._